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What controls the key properties in giant magnetocaloric magnetic materials?

Author(s) : COHEN L. F., MORRISON K., MOORE J. D., et al.

Summary

The authors report their studies on two prototype first order magnetocaloric material systems Gd(5)Ge(4) and CoMnSi using a novel suite of characterisation tools to illustrate how key information is obtained concerning the nature of the magnetic transition when probed at global macroscopic length scales and spatially localised scales of the order of five microns. They show that in first order magnetic field driven metamagnetic systems the magnetic transition evolves as a nucleation and growth process as one magnetic phase seeds inside the matrix magnetic phase. They also demonstrate that using calorimetric methods we can extract the first and second order components of the transition and they discuss whether hysteresis is an intrinsic property of the system.

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Pages: 2009-3

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Details

  • Original title: What controls the key properties in giant magnetocaloric magnetic materials?
  • Record ID : 2009-1596
  • Languages: English
  • Source: 3rd International Conference on Magnetic Refrigeration at Room Temperature
  • Publication date: 2009/05/11

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